Can someone assist by telling me how to fix this problem. I was using the DTMF microphone on the rig, (Yaesu ft857D) and then switched to a regular microphone. The radio being menu driven, I changed the related menu from RMT to NOR as outlined in the operating manual, but when I was ready to use the DTMF microphone again and after switching back to RMT in the menu, I could not get the microphone to work properly. The only functional button is the power button. I did a micro processor reset but that never changed anything as it relates to the microphone. What could be the problem and how can I get it solved. I anticipate a response.

Could you tell me.....are you using the dtmf mic that they sell for the ft857 or are you using one from another radio? I have a dtmf mic from a ft2500 but don't want to try it until someone tells me they have had luck with it. I hear that the control heads are real sensitive to getting blown with erroneous connections.Thanks & 73,Tony - KD1AK

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